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Battery management circuit, battery module and battery management method

A technology of battery management circuit and battery module, applied in the field of battery module and battery management, battery management circuit, can solve the problems of overcharge of single battery, low efficiency of charging and discharging of rechargeable battery, damage, etc., and achieve the effect of increasing service life

Inactive Publication Date: 2012-03-14
ENERGY PASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A battery pack usually includes multiple cells, and the charging and discharging characteristics of each cell are slightly different. If you use the same voltage to charge all the cells, some cells may be overcharged and cause damage.
Conversely, when discharging, some single cells in the battery pack may be over-discharged and cause damage
[0004] In traditional technology, the power management of rechargeable batteries is very important, but most of the current management technologies are managed in units of battery packs, and there is no technology for power management of single batteries in the battery pack, which makes the rechargeable battery The charging and discharging efficiency is too low, and at the same time, during the charging and discharging process of rechargeable batteries, the single cells are easily damaged due to overcharging or over-discharging

Method used

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  • Battery management circuit, battery module and battery management method
  • Battery management circuit, battery module and battery management method
  • Battery management circuit, battery module and battery management method

Examples

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no. 1 example

[0052] figure 1It is a schematic diagram of a battery management circuit according to the first embodiment of the present invention. The battery management circuit 100 is suitable for managing the charging and discharging procedures of a rechargeable battery cell 102 to avoid overcharging or overdischarging. The battery management circuit 100 includes a control circuit 110 and a conduction circuit 120 . The control circuit 110 is coupled to the conduction circuit 110 and the rechargeable battery 102 . The conduction circuit 120 is coupled to the positive terminal and the negative terminal of the rechargeable battery 102 . The control circuit 110 includes a current detection unit 112, a voltage detection unit 114 and a control unit 116, wherein the current detection unit 112 is coupled to the positive terminal of the rechargeable battery 102 to detect the current value flowing through the rechargeable battery 102, and the voltage detection unit 114 is coupled to Connected to th...

no. 2 example

[0063] The present invention proposes another battery module, please refer to image 3 , image 3 is a schematic diagram of a battery module according to a second embodiment of the present invention. The battery module 300 includes a plurality of battery packs 310 , a backup battery pack 320 , a power supply path circuit 330 , a controller 340 and a voltage detection unit 350 . Each of the battery pack 310 and the backup battery pack 320 has a plurality of rechargeable batteries, wherein the rechargeable batteries can be connected in series or in parallel. The power supply path circuit 330 is coupled to all the battery packs 310 and the spare battery pack 320 for switching the conduction paths of the battery pack 310 and the spare battery pack 320 . The voltage detection unit 350 is coupled to the power supply path circuit 330 for detecting whether the battery voltage of each battery pack 310 is normal. The controller 340 is coupled to the voltage detection unit 350 and the...

no. 3 example

[0066] Through the above embodiments, the present invention can generalize a battery management method. Please refer to Figure 4 , Figure 4 It is a flow chart of the battery management method according to the third embodiment of the present invention. Firstly, a plurality of channels are provided to be respectively coupled to the power supply unit (step S410 ), and then the power states of the plurality of rechargeable batteries are respectively detected through the plurality of channels (step S420 ). Next, respectively control the charging and discharging paths of the multiple rechargeable batteries according to the power states of the multiple rechargeable batteries (step S430 ).

[0067] Wherein, step S430 further includes providing each rechargeable battery with a first conduction path and a second conduction path respectively, wherein the first conduction path passes through the rechargeable battery, and the second conduction path does not pass through the rechargeable ...

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Abstract

A battery management circuit, a battery module and a battery management method are provided. The battery management circuit includes a conduction circuit and a control circuit. The battery management is coupled to a rechargeable battery cell and has a first conduction path passing through the rechargeable battery cell and a second conduction path without passing through the rechargeable battery cell. The control circuit is coupled to the rechargeable battery cell and the conduction circuit, and conducts selectively the first conduction path or the second conduction path of the conduction circuit so as to avoid over charging or over discharging of the rechargeable battery cell.

Description

technical field [0001] The invention relates to a power management circuit of a battery, and in particular to a battery management circuit of a single battery level, an array battery management circuit, a battery module and a battery management method. Background technique [0002] Generally speaking, a battery pack (battery), also known as a battery, is composed of multiple single cells (Cell) connected in series or parallel, and the most common one is the lead-acid battery for vehicles. Batteries can be divided into primary batteries and rechargeable batteries or secondary batteries. General batteries cannot be recharged after the power is exhausted, while rechargeable batteries can be recharged. For example, lithium-ion batteries, Nickel-iron batteries, lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, etc. [0003] Due to the storage effect of rechargeable batteries, among which nickel-cadmium is the most serious, if the rechargeable battery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0031H02J7/0019
Inventor 俎永熙林庆龙
Owner ENERGY PASS